When Castle and Beckett investigate the murder of a man with human bite marks on his body, Castle's wild theories start flying. But none are as wild as what their only witness insists happened - a Zombie attack. As the evidence pointing towards an undead assailant piles up, the team plunges into New York's Zombie subculture to find the killer and bring him in -- dead, undead or alive.

Recap

The episode begins with Castle asking his daughter to join him in their regular game. But Alexis is not in a mood to, as she has bigger decisions to make- choosing her college. She wants to go to a college far from home. She tells her dad that it is time that they holster the guns and play adults. Martha tells castle that Alexis is growing up and that she would like to do her own things. Just then Beckett calls; but he ignores her call. He tells his mom that Beckett and he haven’t been hitting it off well off late; and Martha tells him that it is his fault. Partnering with a rugged cop and showing up at crime scene with a stewardess could definitely be good reasons for this to happen. ..